William Gosset analyzed data from an experiment comparing the yield of regular and kiln-dried corn.
Format
A data frame with 11 observations on the following 2 variables.
- reg
yield of regular corn (lbs/acre)
- kiln
yield of kiln-dried corn (lbs/acre)
Source
These data are also available at DASL, the data and story library (https://dasl.datadescription.com/).
Details
Gosset (Student) reported on the results of seeding plots with two different kinds of seed. Each type of seed (regular and kiln-dried) was planted in adjacent plots, accounting for 11 pairs of "split" plots.
Examples
Corn2 <- stack(Corn)
names(Corn2) <- c('yield','treatment')
lm(yield ~ treatment, data = Corn2)
#>
#> Call:
#> lm(formula = yield ~ treatment, data = Corn2)
#>
#> Coefficients:
#> (Intercept) treatmentkiln
#> 1841.45 33.73
#>
t.test(yield ~ treatment, data = Corn2)
#>
#> Welch Two Sample t-test
#>
#> data: yield by treatment
#> t = -0.23413, df = 19.983, p-value = 0.8173
#> alternative hypothesis: true difference in means between group reg and group kiln is not equal to 0
#> 95 percent confidence interval:
#> -334.2292 266.7746
#> sample estimates:
#> mean in group reg mean in group kiln
#> 1841.455 1875.182
#>
t.test(Corn$reg, Corn$kiln)
#>
#> Welch Two Sample t-test
#>
#> data: Corn$reg and Corn$kiln
#> t = -0.23413, df = 19.983, p-value = 0.8173
#> alternative hypothesis: true difference in means is not equal to 0
#> 95 percent confidence interval:
#> -334.2292 266.7746
#> sample estimates:
#> mean of x mean of y
#> 1841.455 1875.182
#>